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Recent questions tagged memory-management
6
votes
2
answers
331
Made easy test series
A demand paging system has page fault service time as 125 time units if page is not dirty and 400 times units of page fault service time if it is a dirty page. Memory access time is 10 time units. The probability of a page fault is 0.3. In case of ... is P. It is observed that average access time is 50 time units. Then, the value of P is ______? [upto four decimal places]
A demand paging system has page fault service time as 125 time units if page is not dirty and 400 times units of page fault service time if it is a dirty page. Memory acc...
shivangi5
1.7k
views
shivangi5
asked
Oct 27, 2017
Operating System
operating-system
demand-paging
memory-management
+
–
2
votes
0
answers
332
Paging
A computer system has a 36-bit virtual address space with a page size of 8K, and 4 bytes per page table entry. What is the maximum size of addressable physical memory in this system?
A computer system has a 36-bit virtual address space with a page size of 8K, and 4 bytes per page table entry. What is the maximum size of addressable physical memory in ...
#Rahul
1.5k
views
#Rahul
asked
Oct 19, 2017
Operating System
paging
operating-system
memory-management
+
–
1
votes
1
answer
333
UGC NET CSE | December 2008 | Part 2 | Question: 40
Which of the following $OS$ treats hardware as a file system? $UNIX$ $DOS$ $Windows$ $NT$ None of the above
Which of the following $OS$ treats hardware as a file system?$UNIX$ $DOS$ $Windows$ $NT$ None of the above
rishu_darkshadow
2.0k
views
rishu_darkshadow
asked
Sep 26, 2017
Operating System
ugcnetcse-dec2008-paper2
operating-system
memory-management
+
–
1
votes
1
answer
334
UGC NET CSE | December 2009 | Part 2 | Question: 39
A program is located in the smallest available hole in the memory is _________ (A) best – fit (B) first – bit (C) worst – fit (D) buddy
A program is located in the smallest available hole in the memory is _________(A) best – fit(B) first – bit(C) worst – fit(D) buddy
rishu_darkshadow
4.6k
views
rishu_darkshadow
asked
Sep 17, 2017
Operating System
ugcnetcse-dec2009-paper2
operating-system
memory-management
+
–
0
votes
0
answers
335
Basic page table question
Consider a system implementing a 2 level page table. Memory access time = 10ns. Hit ratio of page table = 0.3. Page fault access time = 50ns. What is average access time ? Here my doubt is when considering page hit, do we write it as 0.3(10) or 0.3(10+10+10) as we need to access 2 page tables first and then access main memory for hit ?
Consider a system implementing a 2 level page table. Memory access time = 10ns. Hit ratio of page table = 0.3. Page fault access time = 50ns.What is average access time ...
Rajesh R
1.1k
views
Rajesh R
asked
Sep 15, 2017
Operating System
paging
memory-management
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–
0
votes
1
answer
336
[OS] Compile time vs load time address binding
Why logical address and physical address are same in case of compile and load time binding ? In complie time as i have read compiler will generate absoute address ,but this adress for the meain memory location.Logical address can be anything?Why it has ti be same as physical address?
Why logical address and physical address are same in case of compile and load time binding ?In complie time as i have read compiler will generate absoute address ,but thi...
rahul sharma 5
2.6k
views
rahul sharma 5
asked
Aug 23, 2017
Operating System
operating-system
virtual-memory
memory-management
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–
2
votes
1
answer
337
Buddy System
on a system with 1MB of memory using the buddy system what is the first requests due to lack of available memory ? 50k,150k,90k,130k,70k,80k,120k,180k,60k.?
on a system with 1MB of memory using the buddy system what is the first requests due to lack of available memory ? 50k,150k,90k,130k,70k,80k,120k,180k,60k.?
aaru14
4.3k
views
aaru14
asked
Aug 23, 2017
Operating System
memory-management
operating-system
+
–
1
votes
1
answer
338
Multi level paging
Im confused with multi level paging As per my understanding the outer most page table must be in main memory and not all inner page tables to be in memory in 2 level paging by this we can save the memory But with this, faults will be more and time ... if we use more levels of paging more faults wil be their Even then why we are using multi level paging Please can someone help me
Im confused with multi level pagingAs per my understanding the outer most page table must be in main memory and not all inner page tables to be in memory in 2 level pagin...
student2018
1.5k
views
student2018
asked
Aug 18, 2017
Operating System
memory-management
+
–
2
votes
1
answer
339
Memory Management
What is the difference between the functions performed in compile time and functions performed in link time?
What is the difference between the functions performed in compile time and functions performed in link time?
Parimal Paritosh
646
views
Parimal Paritosh
asked
Aug 9, 2017
Operating System
operating-system
memory-management
virtual-memory
+
–
2
votes
1
answer
340
Memory Management
What is the difference between Physical Address, Virtual Address and Absolute Address?
What is the difference between Physical Address, Virtual Address and Absolute Address?
Parimal Paritosh
559
views
Parimal Paritosh
asked
Aug 9, 2017
Operating System
memory-management
operating-system
virtual-memory
+
–
2
votes
1
answer
341
Related to page frame
n a 32 bit processor the virtual address is 22 bit:12 bit(Table index : Offset). What is the size of the page frame and the process page table assuming that each entry in the page table is 4 Bytes?
n a 32 bit processor the virtual address is 22 bit:12 bit(Table index : Offset). What is the size of the page frame and the process page table assuming that each entry in...
Sneha bhusare
1.3k
views
Sneha bhusare
asked
Aug 6, 2017
Operating System
operating-system
paging
memory-management
discrete-mathematics
programming-in-c
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–
1
votes
0
answers
342
geeksforgeeks
A computer system supports 32-bit virtual addresses as well as 32-bit physical addresses. Since the virtual address space is of the same size as the physical address space, the operating system designers decide to get rid of the virtual memory entirely. Which ... c Hardware support for memory management is no longer needed D CPU scheduling can be made more efficient now. GATE-CS-2006
A computer system supports 32-bit virtual addresses as well as 32-bit physical addresses. Since the virtual address space is of the same size as the physical address spac...
Sunil8860
1.2k
views
Sunil8860
asked
Jul 18, 2017
Operating System
operating-system
memory-management
+
–
0
votes
0
answers
343
Paging
Who determines the size of the page table (or to be precise size of virtual address space) for any process? is it operating system or ISA or something else?
Who determines the size of the page table (or to be precise size of virtual address space) for any process?is it operating system or ISA or something else?
Subha Banerjee 2
414
views
Subha Banerjee 2
asked
Jun 29, 2017
Operating System
paging
memory-management
+
–
3
votes
1
answer
344
Test by Bikram | Computer Organization and Architecture | Test 2 | Question: 24
A byte addressable computer can support maximum of $2^i$ KB memory and has $2^j$ instructions. An instruction involving $2$ operands and $1$ operator needs how many bits ? $3i$ $2i + j$ $2i + j + 20$ $i + j$
A byte addressable computer can support maximum of $2^i$ KB memory and has $2^j$ instructions. An instruction involving $2$ operands and $1$ operator needs how many bits ...
Bikram
276
views
Bikram
asked
May 27, 2017
CO and Architecture
tbb-coa-2
co-and-architecture
memory-management
+
–
1
votes
1
answer
345
Test by Bikram | Mock GATE | Test 4 | Question: 22
What is the technique that allows one to execute a program which is not entirely in memory called? Demand Paging Auxiliary Memory Secondary Memory Virtual Memory
What is the technique that allows one to execute a program which is not entirely in memory called?Demand PagingAuxiliary MemorySecondary MemoryVirtual Memory
Bikram
413
views
Bikram
asked
May 14, 2017
Operating System
tbb-mockgate-4
operating-system
memory-management
virtual-memory
demand-paging
+
–
0
votes
1
answer
346
General question
Difference between logical address and physical address. M getting so confused between this two. Sometimes it is mentioned that logical address is what viewd by the user as user can't view physical address but then it is given it is generated by the CPU. Explain in simple language not bookies words. Thanks.
Difference between logical address and physical address.M getting so confused between this two. Sometimes it is mentioned that logical address is what viewd by the user a...
elakashi sharma
315
views
elakashi sharma
asked
May 1, 2017
Operating System
memory-management
+
–
0
votes
1
answer
347
Internal organization of memory chip.
What are external connection in "internal organization of memory chip" ? How these lines are decided ? Example memory with 128 bits (16×8) requires 14 external connections. How we decided this ☝ ?
What are external connection in "internal organization of memory chip" ? How these lines are decided ?Example memory with 128 bits (16×8) requires 14 external connection...
elakashi sharma
4.0k
views
elakashi sharma
asked
Apr 21, 2017
CO and Architecture
memory-management
carl-hamacher
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–
2
votes
4
answers
348
Memory Management
A $1$TB Disk with $4$-KB blocks require $32$MB to store its bit map? Kindly explain how.
A $1$TB Disk with $4$-KB blocks require $32$MB to store its bit map?Kindly explain how.
iarnav
3.9k
views
iarnav
asked
Apr 15, 2017
Operating System
memory-management
operating-system
bitmap
+
–
2
votes
2
answers
349
malloc
What does the following exactly mean? int *p=(int*)malloc(23); Does it mean that the OS allocates a memory of 23 bytes to int(though it requires just 4 bytes)? I know that to make malloc platform independent, we use sizeof, but what if we use the above syntax ... "%d",sizeof(*p)), I get the answer as 4. Why? Should'nt it return 23 since that's what the memory I allocated?
What does the following exactly mean?int *p=(int*)malloc(23);Does it mean that the OS allocates a memory of 23 bytes to int(though it requires just 4 bytes)? I know that ...
Bongbirdie
790
views
Bongbirdie
asked
Apr 10, 2017
DS
memory-management
data-structures
programming-in-c
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–
0
votes
1
answer
350
How does memory layout of a program depend on address binding technique?
I have learned that with run-time address binding, the program can be allocated frames in the physical memory non-contiguously. Also, as described here and here, every segment of the program in the logical address space is ... placed together with the rest of the segments or separately just as in the case of run-time binding ?
I have learned that with run-time address binding, the program can be allocated frames in the physical memory non-contiguously. Also, as described here and here, every se...
Aman Vats
1.8k
views
Aman Vats
asked
Mar 27, 2017
Operating System
operating-system
memory-management
binary-heap
stack
compiler-design
virtual-memory
+
–
2
votes
1
answer
351
Virtual Memory
Consider the following passage to answer questions from Q. Nos. 1 to 6 : Virtual Memory is a technique that allows the execution of processes that may not be completely in the memory. In this system of over-allocation, while a user process is executing, a page fault ... reference string for four frames ? (A) 09 page faults (B) 10 page faults (C) 14 page faults (D) 12 page faults
Consider the following passage to answer questions from Q. Nos. 1 to 6 :Virtual Memory is a technique that allows the execution of processes that maynot be completely in ...
Beyonder
4.2k
views
Beyonder
asked
Mar 14, 2017
Operating System
operating-system
memory-management
virtual-memory
page-replacement
page-fault
page
+
–
0
votes
1
answer
352
Throughput of memory system---urgent
How to calulate the Throughput of memory system when average access time is given
How to calulate the Throughput of memory system when average access time is given
Aboveallplayer
371
views
Aboveallplayer
asked
Feb 10, 2017
CO and Architecture
memory-management
computer-networks
+
–
0
votes
0
answers
353
byron gottfried programming in c (schaum's outline) pageno:302 and 303
i wanted to intialize a 2d array using pointers to pointers and i wrote the following code i know the below code is lot of hardcoding but as i am a beginner to pointers i want to do it this way,please help me ... )+s)); } printf("\n"); } return 0; } https://gateoverflow.in/?qa=blob&qa_blobid=17604332813334679423
i wanted to intialize a 2d array using pointers to pointers and i wrote the following code i know the below code is lot of hardcoding but as i am a beginner to pointers i...
abhijeeth
580
views
abhijeeth
asked
Feb 8, 2017
Programming in C
programming-in-c
array-of-pointers
memory-management
+
–
1
votes
1
answer
354
frame size != page size
Consider a system with 2 level paging applicable the page table is divided into 8K pages each of size 16KB. The memory is byte addressable if the physical address space is 128 MB which is divided into 4KB frames. The page table entry size of outer page table ... bits. What will be the page table size of inner and outer page table. How can frame size and page size be unequal?
Consider a system with 2 level paging applicable the page table is divided into 8K pages each of size 16KB. The memory is byte addressable if the physical address space i...
Pankaj Joshi
2.8k
views
Pankaj Joshi
asked
Feb 8, 2017
Operating System
memory-management
paging
operating-system
+
–
1
votes
1
answer
355
demand paging
Shubham Sharma 2
744
views
Shubham Sharma 2
asked
Feb 4, 2017
Operating System
memory-management
demandpaging
+
–
2
votes
2
answers
356
Memory management
(a) P3, Ps, P3, P2 (b)P2, P5, P3, 426k waits (c)P3, Ps, P2, 426k waits (d)P4, P2, P5, P3
(a) P3, Ps, P3, P2 (b)P2, P5, P3, 426k waits (c)P3, Ps, P2, 426k waits (d)P4, P2, P5, P3
ManojK
631
views
ManojK
asked
Feb 4, 2017
Operating System
memory-management
+
–
0
votes
2
answers
357
Gate Practice
Q.1 VAS = 46 bit , Page size = 4KB , Page table entry = 4B ,3 level paging used ,1st level =12bits, 2nd level = 12bits,3rd level=10 bits(from right to left) Page table size for 4MB process.?? Q.2 Program size = 32MB , Page size = 1KB, VAS=46 bit ,Page table entry = 4B 3 level paging 1st = 12 bit ,2nd = 12 bit , 3rd = 10 bit Page table size.??
Q.1 VAS = 46 bit , Page size = 4KB , Page table entry = 4B ,3 level paging used ,1st level =12bits, 2nd level = 12bits,3rd level=10 bits(from right to left)Page table siz...
Ravi_1511
607
views
Ravi_1511
asked
Feb 3, 2017
Operating System
memory-management
+
–
0
votes
0
answers
358
Memory management
naveen81
1.1k
views
naveen81
asked
Feb 1, 2017
Operating System
memory-management
operating-system
paging
virtual-memory
+
–
1
votes
6
answers
359
UGC NET CSE | January 2017 | Part 3 | Question: 49
A memory management system has 64 pages with 512 bytes page size. Physical memory consists of 32 page frames. Number of bits required in logical and physical address are respectively: 14 and 15 14 and 29 15 and 14 16 and 32
A memory management system has 64 pages with 512 bytes page size. Physical memory consists of 32 page frames. Number of bits required in logical and physical address are ...
go_editor
7.6k
views
go_editor
asked
Jan 31, 2017
Operating System
ugcnetcse-jan2017-paper3
operating-system
memory-management
+
–
9
votes
4
answers
360
Demand Paging
Suppose: TLB lookup time = 20 ns TLB hit ratio = 80% memory access time = 75 ns swap page time = 500,000 ns 75% of pages are dirty OS uses a 3 level page table What is the effective access time (EAT) if we assume the page fault rate is 15% ?
Suppose:TLB lookup time = 20 nsTLB hit ratio = 80%memory access time = 75 nsswap page time = 500,000 ns75% of pages are dirtyOS uses a 3 level page tableWhat is the effec...
biranchi
4.5k
views
biranchi
asked
Jan 25, 2017
Operating System
operating-system
demand-paging
memory-management
multilevel-paging
+
–
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